Year	current US$
1995	4288000000
1996	4140000000
1997	4194000000
1998	4577000000
1999	4899000000
2000	4669000000
2001	4861000000
2002	5838000000
2003	6659000000
2004	7279000000
2005	6850000000
2006	7486000000
2007	8830000000
2008	9698000000
2009	8968000000
2010	9082000000
2011	9840000000
2012	9600000000
2013	10072000000
2014	10443000000
2015	8918000000
2016	9174000000
2017	9804000000
2018	10485000000